Vintage USMC Bravo Button Up Long Sleeve Tan Khaki Shirt Female Marine Uniform

There are no tags that I could find anywhere inside the shirt, but it is easily identifiable as a USMC women's uniform button-up shirt. It measures 19" from armpit to armpit and 17.5" at the waist. From shoulder hem to end of arm the length is 22". I believe this makes it a small size. I am not familiar with sizing women's shirts, however, so if you'd like me to take a certain measurement let me know. I'm guessing the fabric is a polyester cotton blend. Great condition with no flaws I can find.